JP6942842B2 - Synthetic resin bottle - Google Patents

Description

The present invention relates to a synthetic resin bottle, and more particularly to a synthetic resin bottle in which the bottom is displaced inward to absorb the reduced pressure when the inside is in a decompressed state.

When filling a synthetic resin bottle with contents such as wine, the contents are filled in the bottle at a temperature of, for example, 50 to 70 ° C., and a cap is immediately attached to seal the bottle, which is called hot filling. The method is used.

In this hot filling, the inside of the bottle is decompressed because the bottle is cooled after being sealed. Therefore, it is known that the bottom of the bottle is provided with a region (decompression absorption region) that can be displaced in the internal direction of the bottle in response to the decompression to absorb the decompression (see Patent Document 1). ).

International Publication No. 2010/061758

By the way, in such a container, in order to prevent the body from being deformed illegally when the pressure inside the bottle is reduced, the body may be provided with irregularities such as ribs to increase the rigidity, or the pressure absorbing region (pressure absorbing panel). Was set up. However, if the body is provided with irregularities or a pressure reducing absorption panel is provided, there is a problem that the degree of freedom in container design is reduced and it becomes difficult to secure a surface area for attaching a label.

Therefore, the present invention increases the degree of freedom in container design and affixes a label to a synthetic resin bottle provided with a decompression absorption area at the bottom, while preventing awkward deformation of the body due to decompression inside the bottle. It is an object of the present invention to provide a synthetic resin bottle capable of securing a sufficient attachment area.

The present invention has been made to solve the above problems, and the synthetic resin bottle of the present invention has a mouth portion for pouring out the contents, a body portion connected below the mouth portion, and a body portion. A synthetic resin bottle comprising a bottom that is connected downward and has a decompression absorption region that is displaced toward the inside of the bottle as the internal pressure is reduced.
The body portion has a cylindrical straight region having a length in the axial direction along the central axis of the body portion of 100 mm or more and no unevenness.
The weight of the straight region is 11 times or more the weight of the vacuum absorption region.

Further, in the synthetic resin bottle of the present invention, the weight of the straight region is preferably 12 times or more and 15 times or less the weight of the reduced pressure absorption region.

In the synthetic resin bottle of the present invention, the volume of the content storage space is preferably 500 ml or more and 800 ml or less, and more preferably 700 ml or more and 800 ml or less.

According to the present invention, in a synthetic resin bottle provided with a decompression absorption area at the bottom, the degree of freedom in container design is increased and labeling is affixed while preventing unscrupulous deformation of the body due to decompression inside the bottle. It is possible to provide a synthetic resin bottle capable of securing a sufficient attachment area.

It is a side view which shows the embodiment of the synthetic resin bottle according to this invention. It is a partially enlarged cross-sectional view of the synthetic resin bottle shown in FIG. It is a bottom view of the synthetic resin bottle shown in FIG.

Hereinafter, the present invention will be described in more detail with reference to the drawings. FIG. 1 is a side view of a synthetic resin bottle 1 (hereinafter, simply referred to as “bottle 1”) showing an embodiment of the present invention.

The bottle 1 has a cylindrical mouth portion 2 for pouring out the contents, and a body portion 3 having a circular cross section connected below the mouth portion 2 and a bottom portion 4 connected below the body portion 3 are integrally connected. The inside of the bottle 1 is a storage space for accommodating the contents. The content is not particularly limited, but may be, for example, wine or the like, which is hot-filled, sealed, and then cooled to room temperature or lower.

A screw portion 2a for holding the cap is provided on the outer peripheral surface of the mouth portion 2. The injection cap may be held by the undercut portion instead of the screw portion 2a.

The body portion 3 has a cylindrical straight region 3a having no unevenness, and the straight region 3a has a length of 100 mm or more in the axial direction (vertical direction) along the central axis C. A label or the like can be attached to the straight region 3a, and other decorations such as printing and painting can be applied. Further, the body portion 3 is connected to the upper region 3b extending above the straight region 3a and extending to the mouth portion 2 while reducing the diameter upward, and the lower region 3c extending below the straight region 3a and extending to the bottom portion 4. And have. An annular step portion 3d is formed at the boundary portion between the straight region 3a and the upper region 3b, and a first annular groove 3e is formed at the boundary portion between the straight region 3a and the lower region 3c. The upper region 3b has a shoulder portion 3f located on the straight region 3a side and a small-diameter neck portion 3g connected to the shoulder portion 3f.

As shown in FIGS. 2 and 3, the bottom portion 4 closes the heel portion 5 in which the upper end opening is connected to the lower end opening of the body portion 3 and the lower end opening of the heel portion 5, and the outer peripheral edge portion It has a bottom wall portion 7 that serves as a grounding portion 6.

The heel portion 5 has a lower heel portion 5a connected to the ground contact portion 6 from the outside in the radial direction, and an upper heel portion 5b connected to the body portion 3 from below. In this example, the outer diameter of the heel portion 5 is slightly larger than the straight region 3a of the body portion 3. A second annular groove 5c is formed at the connecting portion between the lower heel portion 5a and the upper heel portion 5b.

The bottom wall portion 7 is a cylindrical rising wall 8 that is connected to the radial inside of the ground contact portion 6 and extends upward, and a decompression absorption that is connected to the upper end portion of the rising wall 8 and is provided on the radial inside of the rising wall 8. It has a region 9 and. A plurality of protrusions 8a are arranged on the rising wall 8 at intervals in the circumferential direction.

The decompression absorption region 9 is connected to the rising wall 8 via the annular curved surface portion 10 which is the fulcrum of the rotational displacement, and is connected to the annular outer wall 9a which is convex downward and the outer wall 9a in the radial direction. It has an inner side wall 9b extending upward and a top wall 9c located at the upper end of the inner side wall 9b. The outer side wall 9a is provided with bottom rib portions 11 in which a plurality of recesses recessed in a curved shape upward are intermittently arranged along the radial direction, radially about the central axis C. The reduced pressure absorption region 9 is displaced toward the inside of the bottle with the curved surface portion 10 as a fulcrum as the pressure inside the bottle is reduced. Specifically, the outer wall surface 9a is oscillated upward (toward the inside of the bottle) with the curved surface portion 10 as a fulcrum, and the inner side wall 9b and the top wall 9c are displaced upward corresponding to the outer wall 9a. The shape of the reduced pressure absorption region 9 is not limited to the above.

Here, in the present invention, the weight of the straight region 3a of the body portion 3 is 11 times or more the weight of the decompression absorption region 9. With such a configuration, when the contents of the bottle 1 are hot-filled, the mouth 2 is sealed with a cap, and then cooled to room temperature or lower, the inside of the bottle 1 is decompressed. In addition, the decompression absorption region 9 of the bottom portion 4 is displaced toward the inside of the bottle before the body portion 3. Therefore, the body portion 3 is not deformed illegally. In this example, the decompression absorption region 9 is completely displaced toward the inside of the bottle, so that the volume inside the bottle is reduced by 25 ml or more.

Further, from the viewpoint of more reliably obtaining the decompression absorption effect by the bottom portion 4 while preventing the body portion 3 from being improperly deformed, the weight of the straight region 3a is preferably 12 times or more the weight of the decompression absorption region 9. Is preferable. Further, from the viewpoint of preventing an excessive increase in the weight of the body portion 3 and insufficient rigidity of the decompression absorption region 9, the weight of the straight region 3a is preferably 15 times or less the weight of the decompression absorption region 9.

In the bottle 1 of the present embodiment, the length of the straight region 3a having no unevenness in the axial direction is set to 100 mm or more to increase the degree of freedom in container design and secure a sufficient label sticking area. Can be done.

The volume of the internal space (content storage space) of the bottle 1 is not particularly limited, but is preferably 500 ml or more and 800 ml or less, and more preferably 700 ml or more and 800 ml or less. According to this, it is possible to more reliably exert the effect of suppressing the improper deformation of the body portion 3 while sufficiently securing the accommodating space for the contents.

Hereinafter, examples of the present invention will be described. The present invention is not limited to the contents of the examples described below.

As examples, two Examples 1 and 2 having the shape shown in FIG. 1 and having a ratio of the weight of the straight region 3a of the body 3 to the weight of the decompression absorption region 9 of the bottom 4 being 11 or more are prepared. bottom. Further, as comparative examples with respect to Examples 1 and 2, Comparative Examples 1 and 2 having the ratio of less than 11 were prepared. Table 1 shows the weight (g) of the reduced pressure absorption region, the weight (g) of the straight region, and the above ratio (weight of the straight region / weight of the reduced pressure absorption region) of Examples 1 and 2 and Comparative Examples 1 and 2, respectively. show. The bottles of Examples 1 and 2 and Comparative Examples 1 and 2 have a total weight of 48 g, a volume inside the bottle of 720 ml, and an axial length of the straight region of 113.5 mm. The outer diameter of the straight region is 70 mm, the overall height is 282 mm, and the outer diameter of the heel portion is 73.5 mm.

※別添付

* Attached separately

The bottles of Examples and Comparative Examples were filled with the contents (wine) at 50 to 70 ° C., and after sealing with a cap attached to the mouth, the state of deformation of each bottle when cooled to room temperature was investigated. .. The "absorption capacity" shown in Table 1 was defined as "OK" when the volume inside the bottle could be reduced by 25 ml due to the displacement of the decompression absorption region to the inside of the bottle when the inside of the bottle was depressurized. On the other hand, when the inside of the bottle is decompressed, the decompression absorption area is not sufficiently displaced toward the inside of the bottle and the volume cannot be reduced by 25 ml or more, or the body is improperly displaced before the decompression absorption area is displaced. The case where this was done was defined as "NG".

As shown in Table 1, Examples 1 and 2 in which the ratio of the weight of the straight region to the weight of the decompression absorption region is 11 or more have a body portion as compared with Comparative Examples 1 and 2 in which the ratio is less than 11. There was no improper deformation, and the expected absorption capacity could be achieved by the displacement of the decompression absorption region.

1 Synthetic resin bottle (bottle)
2 Mouth 2a Threaded 3 Body 3a Straight area 3b Upper area 3c Lower area 3d Step 3e 1st annular groove 3f Shoulder 3g Neck 4 Bottom 5 Heel 5a Lower heel 5b Upper heel 5c 2nd annular groove 6 Grounding part 7 Bottom wall part 8 Rising wall 8a Protruding part 9 Decompression absorption area 9a Outer side wall 9b Inner side wall 9c Top wall 10 Curved surface part 11 Bottom rib part

Claims (5)

A body with a cylindrical straight area with no irregularities,
A mouth part that is connected to the upper part of the body part and ejects the contents,
A bottom portion connected to the lower part of the body portion is provided.
The barrel,
The length of the straight region in the axial direction along the central axis of said body portion is at least 100mm,
An upper region that extends above the straight region and extends to the mouth,
The lower region of the straight body that extends below the straight region and extends to the bottom,
It has a groove formed between the straight region and the lower region.
The bottom is
A straight body-shaped heel portion extending from below the lower region and
A bottom wall portion that closes the lower end and the outer peripheral edge of the lower end serves as a grounding portion.
It has a decompression absorption region which is provided inside the grounding portion in the bottom wall portion in the radial direction and is displaced toward the inside of the bottle as the internal decompression occurs.
In the decompression absorption region, a plurality of recesses recessed in a curved shape upward are arranged along the radial direction.
The upper region has a diameter larger than that of the straight region via a step portion formed between the straight region and the upper region.
The lower region has the same diameter as the straight region and has the same diameter.
The heel portion is a synthetic resin bottle having a diameter larger than that of the lower region via a step portion formed between the heel portion and the lower region. The synthetic resin bottle according to claim 1, wherein the weight of the straight region is 11 times or more and 15 times or less the weight of the reduced pressure absorption region. The synthetic resin bottle according to claim 1 or 2, wherein the volume of the storage space for the contents is 500 ml or more and 800 ml or less. The synthetic resin bottle according to any one of claims 1 to 3, wherein the recess is radially arranged. The synthetic resin bottle according to any one of claims 1 to 4, wherein the body portion has an annular step portion or groove portion formed adjacent to at least one end of the straight region in the axial direction. ..

Images